﻿/*
 * Greenshot - a free and open source screenshot tool
 * Copyright (C) 2007-2016 Thomas Braun, Jens Klingen, Robin Krom
 * 
 * For more information see: http://getgreenshot.org/
 * The Greenshot project is hosted on GitHub https://github.com/greenshot/greenshot
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 1 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using GreenshotPlugin.Core;

namespace GreenshotPlugin.Effects
{
	/// <summary>
	/// RotateEffect
	/// </summary>
	public class RotateEffect : IEffect {
		public RotateEffect(int angle) {
			Angle = angle;
		}
		public int Angle {
			get;
			set;
		}
		public void Reset() {
			// Angle doesn't have a default value
		}
		public Image Apply(Image sourceImage, Matrix matrix) {
			RotateFlipType flipType;
			if (Angle == 90) {
				matrix.Rotate(90, MatrixOrder.Append);
				matrix.Translate(sourceImage.Height, 0, MatrixOrder.Append);
				flipType = RotateFlipType.Rotate90FlipNone;
			} else if (Angle == -90 || Angle == 270) {
				flipType = RotateFlipType.Rotate270FlipNone;
				matrix.Rotate(-90, MatrixOrder.Append);
				matrix.Translate(0, sourceImage.Width, MatrixOrder.Append);
			} else {
				throw new NotSupportedException("Currently only an angle of 90 or -90 (270) is supported.");
			}
			return ImageHelper.RotateFlip(sourceImage, flipType);
		}
	}
}